研究目的

Investigating the use of water-dispersed fluorescent silicon nanodots (SiNDs) as probes for the fluorometric determination of picric acid (PA) via energy transfer.

研究成果

Water-dispersed fluorescent SiNDs were synthesized by a one-pot hydrothermal strategy using tetraethyl orthosilicate (TEOS) as silicon source and trisodium citrate as reducing reagent. It not only supplies a simple and convenient method to synthesize fluorescent SiNDs, but also develops a novel fluorometric method for PA analysis. Since the fluorometric method possess the advantages of high sensitivity, good selectivity and fast response, it paves an efficient and wide way for the application of fluorescent SiNDs and energy transfer principles in environment analysis. However, it still needs great efforts to synthesize fluorescent SiNDs and makes fluorescence overlap of 100% quantum yield with donors.

研究不足

The need for working in the UV makes the probe prone to interferences by biomatter. Blood, serum, cells, marine water, waste waters etc. always display strong background UV absorption and fluorescence. The UV light used for fluorescence excitation will be screened off by UV absorbers and this will weaken the signal. The same is true for emitted UV fluorescence which will be screened off. This limitation needs the pretreatment before real sample analysis.